Abstract
Cans fitted with herring-bone fins are used for cooling uranium in certain nuclear reactor. By herring-bone is meant a staggered arrangement of the fins which have a plane of symmetry parallel to the general direction of liquid flow. The main geometrical parameter are then: the number of fins, the number of herring-bones, the angle of inclination of the fins with respect to the can axis, the dimensions of the fins, the can diameter and the channel diameter. The research is essentially experimental. The test are of three types: full size tests, in conditions approaching those in the reactor (constant flux, CO{sub 2} under pressure); full size tests but with a constant wall temperature, much easier to set up, and intended to distinguish rapidly between the merits of the various types of can; large-scale tests with air at atmospheric pressure for studying the phenomena in more detail. For each can tried out there is a corresponding pressure drop coefficient, a mean thermal exchange coefficient Mo-bar and a minimum exchange coefficient Mo{sub min} and Mo-bar are related by the expression Mo{sub min} = Mo-bar * f{sub c} * f, where f{sub c} and f are respectively circumferential and longitudinal singularity factor determined
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Pelce, J;
Francois, S;
Houseaux, O;
Pierre, B
[1]
- Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Citation Formats
Pelce, J, Francois, S, Houseaux, O, and Pierre, B.
Experimental study of heat transfer and pressures drops for cans with spiral herring-bone fins; Etude experimentale du transfert de chaleur et des pertes de charges des gaines a ailettes helicoidales en chevron.
France: N. p.,
1964.
Web.
Pelce, J, Francois, S, Houseaux, O, & Pierre, B.
Experimental study of heat transfer and pressures drops for cans with spiral herring-bone fins; Etude experimentale du transfert de chaleur et des pertes de charges des gaines a ailettes helicoidales en chevron.
France.
Pelce, J, Francois, S, Houseaux, O, and Pierre, B.
1964.
"Experimental study of heat transfer and pressures drops for cans with spiral herring-bone fins; Etude experimentale du transfert de chaleur et des pertes de charges des gaines a ailettes helicoidales en chevron."
France.
@misc{etde_20771720,
title = {Experimental study of heat transfer and pressures drops for cans with spiral herring-bone fins; Etude experimentale du transfert de chaleur et des pertes de charges des gaines a ailettes helicoidales en chevron}
author = {Pelce, J, Francois, S, Houseaux, O, and Pierre, B}
abstractNote = {Cans fitted with herring-bone fins are used for cooling uranium in certain nuclear reactor. By herring-bone is meant a staggered arrangement of the fins which have a plane of symmetry parallel to the general direction of liquid flow. The main geometrical parameter are then: the number of fins, the number of herring-bones, the angle of inclination of the fins with respect to the can axis, the dimensions of the fins, the can diameter and the channel diameter. The research is essentially experimental. The test are of three types: full size tests, in conditions approaching those in the reactor (constant flux, CO{sub 2} under pressure); full size tests but with a constant wall temperature, much easier to set up, and intended to distinguish rapidly between the merits of the various types of can; large-scale tests with air at atmospheric pressure for studying the phenomena in more detail. For each can tried out there is a corresponding pressure drop coefficient, a mean thermal exchange coefficient Mo-bar and a minimum exchange coefficient Mo{sub min} and Mo-bar are related by the expression Mo{sub min} = Mo-bar * f{sub c} * f, where f{sub c} and f are respectively circumferential and longitudinal singularity factor determined from a statistical study of all the temperatures measured for each can. The results are presented in about thirty tables and figures the most noteworthy results being summarized in the conclusion. (authors) [French] Les gaines a ailettes en chevron sont utilisees pour le refroidissement de l'uranium dans certains reacteurs nucleaires. Par chevron, on entend une disposition alternee des ailettes ayant un plan de symetrie parallele a la direction generale de l'ecoulement fluide. Les principaux parametres geometriques sont alors: le nombre des ailettes, le nombre de chevrons, l'angle d'inclinaison des ailettes par rapport a l'axe de la gaine, les dimensions des ailettes, le diametre de la gaine et le diametre du canal. L'etude est essentiellement experimentale. Les essais sont de trois types: essais en vraie grandeur, dans des conditions proches de celles existant dans le reacteur (flux constant, CO{sub 2} sous pression); essais en vraie grandeur mais a temperature de paroi constante, d'une mise en oeuvre beaucoup plus simple, et destines a une discrimination rapide entre les differents types de gaine; essais a grande echelle avec de l'air a la pression atmospherique pour une observation des phenomenes dans le detail. Pour chacune des gaines experimentees correspond un coefficient de pertes de charge, un coefficient d'echange thermique moyen Mo-bar et un coefficient d'echange minimum Mo{sub min} servant au calcul du point le plus chaud de la gaine; Mo{sub min} et Mo-bar sont relies par l'expression Mo{sub min} = Mo-bar * f{sub c} * f{sub l}, ou f{sub c} et f{sub l} sont respectivement des facteurs de singularites circonferentielle et longitudinale, determines apres un examen statistique de l'ensemble des temperatures mesurees sur chaque gaine. Les resultats sont rassembles sur une trentaine de tableaux et figures, les resultats les plus marquants etant resumes dans la conclusion. (auteurs)}
place = {France}
year = {1964}
month = {Jul}
}
title = {Experimental study of heat transfer and pressures drops for cans with spiral herring-bone fins; Etude experimentale du transfert de chaleur et des pertes de charges des gaines a ailettes helicoidales en chevron}
author = {Pelce, J, Francois, S, Houseaux, O, and Pierre, B}
abstractNote = {Cans fitted with herring-bone fins are used for cooling uranium in certain nuclear reactor. By herring-bone is meant a staggered arrangement of the fins which have a plane of symmetry parallel to the general direction of liquid flow. The main geometrical parameter are then: the number of fins, the number of herring-bones, the angle of inclination of the fins with respect to the can axis, the dimensions of the fins, the can diameter and the channel diameter. The research is essentially experimental. The test are of three types: full size tests, in conditions approaching those in the reactor (constant flux, CO{sub 2} under pressure); full size tests but with a constant wall temperature, much easier to set up, and intended to distinguish rapidly between the merits of the various types of can; large-scale tests with air at atmospheric pressure for studying the phenomena in more detail. For each can tried out there is a corresponding pressure drop coefficient, a mean thermal exchange coefficient Mo-bar and a minimum exchange coefficient Mo{sub min} and Mo-bar are related by the expression Mo{sub min} = Mo-bar * f{sub c} * f, where f{sub c} and f are respectively circumferential and longitudinal singularity factor determined from a statistical study of all the temperatures measured for each can. The results are presented in about thirty tables and figures the most noteworthy results being summarized in the conclusion. (authors) [French] Les gaines a ailettes en chevron sont utilisees pour le refroidissement de l'uranium dans certains reacteurs nucleaires. Par chevron, on entend une disposition alternee des ailettes ayant un plan de symetrie parallele a la direction generale de l'ecoulement fluide. Les principaux parametres geometriques sont alors: le nombre des ailettes, le nombre de chevrons, l'angle d'inclinaison des ailettes par rapport a l'axe de la gaine, les dimensions des ailettes, le diametre de la gaine et le diametre du canal. L'etude est essentiellement experimentale. Les essais sont de trois types: essais en vraie grandeur, dans des conditions proches de celles existant dans le reacteur (flux constant, CO{sub 2} sous pression); essais en vraie grandeur mais a temperature de paroi constante, d'une mise en oeuvre beaucoup plus simple, et destines a une discrimination rapide entre les differents types de gaine; essais a grande echelle avec de l'air a la pression atmospherique pour une observation des phenomenes dans le detail. Pour chacune des gaines experimentees correspond un coefficient de pertes de charge, un coefficient d'echange thermique moyen Mo-bar et un coefficient d'echange minimum Mo{sub min} servant au calcul du point le plus chaud de la gaine; Mo{sub min} et Mo-bar sont relies par l'expression Mo{sub min} = Mo-bar * f{sub c} * f{sub l}, ou f{sub c} et f{sub l} sont respectivement des facteurs de singularites circonferentielle et longitudinale, determines apres un examen statistique de l'ensemble des temperatures mesurees sur chaque gaine. Les resultats sont rassembles sur une trentaine de tableaux et figures, les resultats les plus marquants etant resumes dans la conclusion. (auteurs)}
place = {France}
year = {1964}
month = {Jul}
}